{
  "manageEntity": {
    "action": "Save",
    "entityId": "231676646",
    "entityType": "Track",
    "nonce": "0x5adaec1fdd8b7d5780c10427d1496fecf246f8cbe7d11615443008c9c2e301e4",
    "signature": "0xe263a9a252ef2ba35f5a9a3ca2fd6963a6a52181dfa1b5235d2e4cd193639b6e69e80db69f630cb44a2302278c82eb729ebe35fbbc54252ab4e04a06845f7c481b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}