{
  "manageEntity": {
    "action": "Save",
    "entityId": "500982251",
    "entityType": "Track",
    "nonce": "0xf6bd9b4d0edb10d02a96e76b04b93ef2a1413dbb228d17c88f78c2c48fa558ef",
    "signature": "0x52a0153625224455ef58113d6f121424ff49898dc345a31188fd4fe5fd0039236919ee59566e36306ee4824676bc50a9052479091f1de3087d6ebea8da26e2c71c",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}