{
  "manageEntity": {
    "action": "Save",
    "entityId": "218690092",
    "entityType": "Track",
    "nonce": "0x274de9a01a7c15605612aa51b13bcafff8b2c58e2d1b90a9d4c47396b349fac8",
    "signature": "0x063d30c560b9fb6561196aada02fe92c8e382abe414242adbfab4fab975d428e799ab74706a1b707e47edc1f7bdcc0ace3065f5990d51c4b52a47d362e4946371b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}