{
  "manageEntity": {
    "action": "Save",
    "entityId": "1618557208",
    "entityType": "Track",
    "nonce": "0xa5aeccf22cd6b80276dcd049d858ad5e15309e0d2e7d802b09e91c22fa35c7da",
    "signature": "0x142d789991090052e8f51aa4ca043e024af551c9d23fa65220f67cb2b758edff65a718153b889c1f169296c51995e80a2a9069fc4903ebc280bc84d89fec85b01c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}