{
  "manageEntity": {
    "action": "Save",
    "entityId": "1228567066",
    "entityType": "Track",
    "nonce": "0x8bc23489c2f690d13004bd081bd19e440fa8555573bbfbba2ffc993b9f43958f",
    "signature": "0x45c4ca4399764543b0ddf4cae77449064bae346ef9cb0f2ef1273b718c47972762c3737fda1464b527d910b91d0a9540c80aa0e2287c84b8547111fbb79c1ffb1b",
    "signer": "0x76433fcfc10E04743aB4EB98660d4B47526AD243",
    "userId": "328228955"
  }
}