{
  "manageEntity": {
    "action": "Save",
    "entityId": "683500",
    "entityType": "Track",
    "nonce": "0xcda5fb0386527e2455c2ba804a9b64c1e808316631023315286990c3ee3be619",
    "signature": "0x237b6bbfcaafef4e5fc0b48c53236c2e37b872c93336a03b888071dcf71b82e17ea2064d68881de5b20776c0112824ea5d238265a454d4551395d303c02555281c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}