{
  "manageEntity": {
    "action": "Save",
    "entityId": "1866300027",
    "entityType": "Track",
    "nonce": "0xf34fe510261e918fd695f1bbada287072462913df43fed80e368202811bf88da",
    "signature": "0x7159420de6eab1384b88ef9e0bbfc843b6b9b6243a49eb032d12ab987a20010667a20b1b1b78a031d65c9eb919046582b2d8ddd8606188e3014f7cdf2eb5cbd71b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}