{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd62f1dff81e48d85fcbf9ed1040ac94c3ddc1c100535b8db5523faeb1e4e5973",
    "signature": "0x7614bca4d4784a53b77f02c926e0f44306c35350954d8737edef015d6fe6c02951625ca39fc7298193e289641d616bc5fbfc7bde0e80e109a8674928062714e81c",
    "signer": "0x5556f3112F03a658Ff1522aFd09D44a9a8C51a2f",
    "userId": "156266332"
  }
}