{
  "manageEntity": {
    "action": "Save",
    "entityId": "1411818727",
    "entityType": "Track",
    "nonce": "0x075c38f38f0d67153349879be22158fb51b8d0c603a47de72c547b8623717c48",
    "signature": "0x65ba00a3865453c73c1ceb236d363e6baa7df938084726fb1bf22ad1ed9bcba540d043b38f8bc5c7544e352e5337831b923a24b5ac57f8acfd3f3686b12220e21c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}