{
  "manageEntity": {
    "action": "Save",
    "entityId": "611531363",
    "entityType": "Track",
    "nonce": "0xb8940bddadabf6a1651d615848d49734319bac227acf77fa35fd70d126e66dd4",
    "signature": "0x9f95d1c15255f22d038cf7578f798c3a1cb62f6f4a0e8082247059ed3c0f889c75fd48e081e4eadfef645728e757fc470c5df3f8ed0043dda12a3d5146186c3d1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}