{
  "manageEntity": {
    "action": "Save",
    "entityId": "1922751444",
    "entityType": "Track",
    "nonce": "0x9e15eeff479b1bdd18ae1d2b43004273560b9635be44dfa1d0cb537a60161831",
    "signature": "0xc6428171b338d4c4bf2560443aa07203eddc374b3fe4f13d1bd096815ff81bca28b2040d446f6577b62b49a30dda106374d695ba6c6b5ed60bd72507a6e00c441c",
    "signer": "0x19EDB4c1a8740c323f6e57B80F3422C01875289e",
    "userId": "390804"
  }
}