{
  "manageEntity": {
    "action": "Save",
    "entityId": "1332099584",
    "entityType": "Track",
    "nonce": "0x886a464ede75db46f259a0afaddf6ff0e0d98e6935b6dbd75bcfd307f2ada0ec",
    "signature": "0x0518f53c4e732fcc8f3ef7e4d32bb5546fe60899a1c7dca2d13bff89e4d91693637d7dc3c352e0a919739531a6e80639716ed049862f60c85c0190914dfa3b161b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}