{
  "manageEntity": {
    "action": "Save",
    "entityId": "1063815714",
    "entityType": "Track",
    "nonce": "0xa8617fb211cfbb4c7e3631973561c46a4c490efccfcace2aabbbcfd203e20a0b",
    "signature": "0x8f3d91c716bcff0159df164c7b6679e8528195665e24e84dcbbb0657eb4fe43949a8134a54b59bac39882a72d34fcbdd33f8bc315bbc8b89e524952de0c1b4921c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}