{
  "manageEntity": {
    "action": "Save",
    "entityId": "1564960262",
    "entityType": "Track",
    "nonce": "0x465296087bf680572c28334cb9e70f789b7c5e24f21d9780ea86af326c995d41",
    "signature": "0x4e8213ec226aaaa68880196527d6c7c91f09f41f7e957178dad697c20564392c6f4ac0fe3b9c24c0767e20869b91957347fe6956e0c24101bd5e8d6094d966471b",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}