{
  "manageEntity": {
    "action": "Save",
    "entityId": "1029540956",
    "entityType": "Track",
    "nonce": "1792530584385131722",
    "signature": "0x8e57b5716ba9bb706a268aca209b4415f8fd1d23ba8e54f18ff758a002592a3a3fb0b3c25ecb3a99b615303021ef876b3d8fd3306269399ea296bd857a8e51431c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}