{
  "manageEntity": {
    "action": "Save",
    "entityId": "161187823",
    "entityType": "Track",
    "nonce": "0x70c14d826ad98fbfd8b3c3917de1613e2b0c18ece2eb07b498aa5a026b1d6155",
    "signature": "0x534e67743ee727c7db8f856a1bd755614df316b656f2c913faa9ec6574f564892686a5164f162dfb82000e2e0e62b832ab45826a6f36769781dc7c8107d21eff1b",
    "signer": "0x738Fb353b57EdB4d1f33c0049D33b204243db2ad",
    "userId": "693463302"
  }
}