{
  "manageEntity": {
    "action": "Save",
    "entityId": "113248586",
    "entityType": "Track",
    "nonce": "0x41f28adf900ec002ef9a0c8fc5cc3eeff4fa047933c3e5b560ddb8a826c21e30",
    "signature": "0x6b57a037657e16a6ca88b3200bd996e6d2618340bddaac0101a11d163712489e6a10c4112f86e7822b245017dd11c55124ac78c3b3605e5ecc56d7a357702ef41c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}