{
  "manageEntity": {
    "action": "Save",
    "entityId": "1019292966",
    "entityType": "Track",
    "nonce": "0xdf6d672c91506585d13e7628cf12f71f8ec3a48f3a4e088639ea1fff559abe45",
    "signature": "0x08db71987fdf32a4e950cea77f30cb24b65073255afbe4259009b5e02095116469b91e0f79a2977bc9df6a5e3fc4420d4439b5a8e2e0cb887d9981f427539dc91b",
    "signer": "0x2205833bD910998b6F99FDbd53F5FBd387134b96",
    "userId": "424142613"
  }
}