{
  "manageEntity": {
    "action": "Save",
    "entityId": "1895070735",
    "entityType": "Track",
    "nonce": "0x553c9b23abc12ec05c84c0f078387476841ebedfeb7bb91bc52bdcd180b46ef1",
    "signature": "0x95bac8afc0069f06177fa138999036bd0db36e6594846fa0881124eca09deb353213600030b67877095f912fd4637d1e4b4b824066de0ea6f4e3cc032adba3001b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}