{
  "manageEntity": {
    "action": "Save",
    "entityId": "699652578",
    "entityType": "Track",
    "nonce": "1790020806699092972",
    "signature": "0x4fe3545fcd159b0879211dd3c908adf71b4e8802ce5a8236f756667ad5066e975fe48ce4462ca1e099d78b69d3e7170d010d60a292c59395dff6ddc07f9c442a1c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}