{
  "manageEntity": {
    "action": "Save",
    "entityId": "526865049",
    "entityType": "Track",
    "nonce": "0xbe7f24a4ba28803fdf0ad38c146d62696ae78e254e877b6ca643bcf60b9b025f",
    "signature": "0x0db4f012962cdd5d753cb4875eca081a55895f5aadcda3323973d967a6ecaef506cf0bcb4214de7c1c0afae8e28a4b3a8b71760d0f0f16ce926bbad755aba4d31b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}