{
  "manageEntity": {
    "action": "Save",
    "entityId": "625210821",
    "entityType": "Track",
    "nonce": "0x9430a9a6fded7c2878a1efa113f1256c3621b2bdb9afa404be97c8dc58ecd6f5",
    "signature": "0x5afead9d60b58c5e635dec9418bccfa2bcd48fd596f39d55747a4aaf870b76e62ded9dcd7d75476eddcbfb45b0979510760becadac0c266fe5ddcd1dc41bc6a91c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}