{
  "manageEntity": {
    "action": "Save",
    "entityId": "576884210",
    "entityType": "Track",
    "nonce": "0x49dd58687ac7ff4dee0d7ba7669a613cf84cef0cd88d09200a9d5951bf36070f",
    "signature": "0xdbf3098e0139d1528b11ddcf0bb84de591a7a5c0c85359029205fded7ee58a8949a2f6d99a58a627cbabcf85386d72176370f583339fad4b5eaf45c0815a1c6e1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}