{
  "manageEntity": {
    "action": "Save",
    "entityId": "956002590",
    "entityType": "Track",
    "nonce": "0xf3fc03f7dcd986df3735e59bef1bc3536d53ff651e356f2aef0368cf66d4a28b",
    "signature": "0x3cd11c2007c50f5ece9e08771c2599dc236d9406c58f6af2667f0bfe58088efb6a443546b99ada43c381186ff96ef47d16e18a12d437c2ada76ee71449a1aed51c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}