{
  "manageEntity": {
    "action": "Save",
    "entityId": "1401721895",
    "entityType": "Track",
    "nonce": "0x65996b95f7313b709897d505e42fb7a4fd61ea7463c3bc12ee94395bb592b1a4",
    "signature": "0xc6b8d54db96100b15cbf5b918bbb15889f5c83661a7d6805905655b590b8f699689fc1d9906dd0e6f7c0622609d43c8a40da4684bf51fda392991fd7358d17b61c",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}