{
  "manageEntity": {
    "action": "Save",
    "entityId": "1183940903",
    "entityType": "Track",
    "nonce": "0xbd18f8430e6db6542dec32c5a48b00f0fa36657129b1ec1fca5db4a1beb4a547",
    "signature": "0xdf481898a118c13e150fbb59130440617d5b45badd254cf52d57d1113e6560f5000760bd49758562d28871c277594c054abef09c2076a09790c1875c9e61ec161b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}