{
  "manageEntity": {
    "action": "Save",
    "entityId": "1831506538",
    "entityType": "Track",
    "nonce": "0xf5a3a7f495e70d6274afc2ca64ad47eb43a68feac21a72039df820456e8c21f3",
    "signature": "0xf79f49826883b77153987c8dbc280881c7b8242123e3f8c830989a63547201ee64691f86be579f9764ecd6b582a1cc060f2e47243b886891a98871f5d851e2de1c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}