{
  "manageEntity": {
    "action": "Save",
    "entityId": "1315375136",
    "entityType": "Track",
    "nonce": "1792393813911185540",
    "signature": "0x59369eb780d186fb6b8ab75209c404988728bf16bf92f562587090da4b99805d0fb0af3deb9e419e6c957a4f3821108862a4c411842a53063de3651f78a6a5321b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}