{
  "manageEntity": {
    "action": "Save",
    "entityId": "1329796785",
    "entityType": "Track",
    "nonce": "0x60fea552214f862ed8b4472974d17dae1898b8caa97de5b3c4f738e3eb575fe5",
    "signature": "0xdad93104f5e85a422a04ffa1f464f8fc697eeb8f72ef3c8b4dfc67c0cc0abe532cca66949b75e1b02e525633c3db157bfcb082467ae7811c238d5dde81a250b11b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}