{
  "manageEntity": {
    "action": "Save",
    "entityId": "100898464",
    "entityType": "Track",
    "nonce": "0x26ec530c463af37dbd91fdabecd2e022bf42b5aa7689e9f90cf0aa9dc5d39859",
    "signature": "0x85f26ad1b5d53e8dbdaf6850ee9cbba730f3cd4e31e118ec7e25b13fdcc1d81d2f500059ae65b36133501d86412bccaf3303ba26445eacbe8d387427d2a18bd51c",
    "signer": "0x7608e25c1Da910791608222Ef1915B7FFB77c856",
    "userId": "116841"
  }
}