{
  "manageEntity": {
    "action": "Save",
    "entityId": "1774105454",
    "entityType": "Track",
    "nonce": "0xa763053b8939fc3f9a6ef3eb3be1a42d0135611c2c92481ca24dc05068f7b44f",
    "signature": "0xb4246d00eb8059ec2755641db444d10aa991edbb7d0ce14d180f1b7fea05a2b81424ccbfa07212f883066036e6e3d44b7a1a1aed5925076df7800282db0f2fba1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}