{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xff71028e0f9ffa0519f219fb5ea9a11b916803271b3102c534ad704eb0f51b61",
    "signature": "0x58697ff3029c24d3699dc5ecde4183bc10384110fa740ad173bb7448556bdd30219ed45ec5521fed0731ee5ca2ce35a3d8aab43b856c85e5d20c4a401268b1ff1c",
    "signer": "0xedbaB5b2971F768e04CeeB07Fe8C6D0CC2d35bCa",
    "userId": "740066624"
  }
}