{
  "manageEntity": {
    "action": "Save",
    "entityId": "1699912152",
    "entityType": "Track",
    "nonce": "0xd8748d1e2c31f465f1e04a8143422f943907c1ed0c2ce1eb4def5025e817d36f",
    "signature": "0x03074abc760d167c5245dd54bcf9257d01b6ed54bbd77baf0c38f9b197ad8ea12e7f6a4322b73bff7671124ed7c3f61ce987d9312283d1b8f5c077470b116add1b",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}