{
  "manageEntity": {
    "action": "Save",
    "entityId": "422137096",
    "entityType": "Track",
    "nonce": "0x593c8415ad46349d2cce53927adee7e10a0fb2ba36269a9246d01b69a2f4aa8f",
    "signature": "0xe6ebb423b2cc7b17be9295b9777c9843b6df7c32e4addb17f45ae105d7545bcf13084c6c9806898199577b6a7b2eede35471b7601f96c68e93303afbe954cacb1c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}