{
  "manageEntity": {
    "action": "Save",
    "entityId": "336513",
    "entityType": "Track",
    "nonce": "0x125aa4edc7220bf723ced76bd16b90ce50814cb3fd1ca29d45acda419ec15e28",
    "signature": "0x8181dcbed88d4a96c6c8970538cc14fee77a5dd8f6b26c0f6aaaacf7d96fb40d79cdaf2ac2d3961852c437727f09757aae700430ab67d3e4045b4d12a1c28d411c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}