{
  "manageEntity": {
    "action": "Save",
    "entityId": "1624638144",
    "entityType": "Track",
    "nonce": "0x8182f58e8bbb0c78011b15b489c48ca83e74ffb2e5d91db973fb2954b9013003",
    "signature": "0x145aff1dcbd1fe961a2faee749cd4736cfc219d354ebc86e63ddca5361ab7035369e91b61be1af03e64a5ffb6e1a05a0595c81ce81d2d631235753bce5b1f9561c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}