{
  "manageEntity": {
    "action": "Save",
    "entityId": "853529312",
    "entityType": "Track",
    "nonce": "0x167ddf21b45605877f4422d8596249ae590b400fe8485d88ffa8e1bbaa6b73cd",
    "signature": "0x198d06634684cb58b8dd025307bcbbc7f565d0a2e0b26a32e9db8c27cbf0a1c20b72882ee44b2c34b60befad31b1ff9dd18e0494eba66c73d8d65991512c0c681c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}