{
  "manageEntity": {
    "action": "Save",
    "entityId": "451996",
    "entityType": "Track",
    "nonce": "0x62aeb89f2c87f5e094287fe92f5459b3fa20728f0efdfd7d744e9106a77f771a",
    "signature": "0x299dd44362fd2ed05db47a8551f70fe63e8e6fb10c17a58115c5dde80a722cac3d9104718823e14843313e5caa970fbe744081b3194d91cf11095545184513561c",
    "signer": "0x0c386B8dC8A28F528dfcebD831b0C1efAB4090bE",
    "userId": "767216175"
  }
}