{
  "manageEntity": {
    "action": "Save",
    "entityId": "1703551439",
    "entityType": "Track",
    "nonce": "1787899894967780997",
    "signature": "0x7c0aa503319d03ef9892ff5988b20271c7e15aae7c57501e079ac571048c88043bf7eae635d80883ba762cfa0b3158fca6a90cbc187511d61bdd90751f5604401c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}