{
  "manageEntity": {
    "action": "Save",
    "entityId": "542122036",
    "entityType": "Track",
    "nonce": "0x86e5588d445bd333b27b807a232048c8d87a65bfdfaeeb0be4825f942e1b800e",
    "signature": "0x584e9163431ca5b17b29f20444b274ad8383576f52978ad74fb3270cb1a3b36012813dc32522fc22494cbdb0da0bc93fd761efb8d4b5ebdb32c8a2b47c6773cf1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}