{
  "manageEntity": {
    "action": "Save",
    "entityId": "324660302",
    "entityType": "Track",
    "nonce": "0x9419d6cf3850c5cb229bcadbeede587c758591068e067ff065ad5ab418190796",
    "signature": "0x9ca4f79a9a1339489ca94a900ca478d02c8e5c676f47aff3418dd6c225894b6762bf07d0ae2cbe4b43709e6e9638ff6b436a98f94aaa4f60f79004f97b24288e1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}