{
  "manageEntity": {
    "action": "Save",
    "entityId": "856930817",
    "entityType": "Track",
    "nonce": "0xbd4a36baf1c487d11acd820b6dbb2517f8cec18efaf67bb03b292345cfa8bbe7",
    "signature": "0x47ba1381bb0082e63eaa54c44ad9924f95c416f1704dfc7f0301dfb6ae7152df63014fc1372a2d297e5bb8f41f729098a515b11c24a2a0a00086431c6a3b93941b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}