{
  "manageEntity": {
    "action": "Save",
    "entityId": "528235738",
    "entityType": "Track",
    "nonce": "0x5c914b94a9376a827b20868a29f3837a0d22d6ff1c2c7beb57cba9df1cddb4c9",
    "signature": "0xc5a18af91504cb3877de6c7f7ad11d8727f0ba270b6b119ea3d89c5afd8717a62c986f02a1bf8be21996da5cc7958d8e12b7911da7c6f772b7df2f5ec970b1031c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}