{
  "manageEntity": {
    "action": "Save",
    "entityId": "702072666",
    "entityType": "Track",
    "nonce": "0xde1c7aa8bed6fad7a203312cb2f0ce85d42304a6866ff5d30fc2783764fc28e0",
    "signature": "0xa7af4e55ed3ca93d0050ae6561d7a9c975b5feb9f440cef98394e45d6d6b50ac60935ba695bd45779361870460fc15970126a4455dae75b3874f1fc15d68d8461c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}