{
  "manageEntity": {
    "action": "Save",
    "entityId": "322862218",
    "entityType": "Track",
    "nonce": "0x5566e3f3c80f1d3bef532d09424df2f2c6c4130310aaca69b558017d4e39f3ed",
    "signature": "0x85c24407ae55ef52f88aa5dd10239e5c539c7c4bdacab3bbe0227a74424732f95351a40e6e5b63fe75a269f183762ab4760843a1b2b472c64f2161320138609c1c",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}