{
  "manageEntity": {
    "action": "Save",
    "entityId": "1046974",
    "entityType": "Track",
    "nonce": "1788187581961448715",
    "signature": "0xfe48d4615df6dd8c2cc840ad712acc05267efce05964ed89eac0a65309f586451d9be415379b0b3f629a9769a355ca17f2ac81353843c2147ef6f8a04637be311c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}