{
  "manageEntity": {
    "action": "Save",
    "entityId": "226512",
    "entityType": "Track",
    "nonce": "0x4370734be16737e7c09f97ed22340162b3d9060dc92168f7a6f5339aae13bf6b",
    "signature": "0x75416ec6cb9e919c39575dc5e0ecf9880e17352b7f09b52c24283cc5c9d15a31391a89b0bb5655fce2eef3a67ae0aeab060e66a99a24e6716001b0d973aa830e1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}