{
  "manageEntity": {
    "action": "Save",
    "entityId": "363815",
    "entityType": "Track",
    "nonce": "0x5752c19ba4a67a7bf72646339b9cc19037a1e4838b8a3741791507e3b967ec46",
    "signature": "0x35b0b302cfc4ad09d23d2e6154057a6b0acb07fed33663d0db8641c49a80738f0ede4e1bf2887824796401c81d1e38d2ccb658b6093724dcd2e453178da483b51b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}