{
  "manageEntity": {
    "action": "Save",
    "entityId": "1429601071",
    "entityType": "Track",
    "nonce": "0xd6cd9307a9feca39e5fc1d98bfa5451efca045292c6ebfa7d13e36290904e676",
    "signature": "0xfcb1632e3913abd81d607e85839044ea0f7a1647a01053535c8d6fc340f436b3724e24dcfd7ee25fb93ba886f0782f67d549273e632e6e95478f36daf5b8a3c71c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}