{
  "manageEntity": {
    "action": "Save",
    "entityId": "2002720451",
    "entityType": "Track",
    "nonce": "0x0014e8944ce5993b773cde3f74fac625ac42247fa15437b52ec5f153be330913",
    "signature": "0x3e215dbb2ebe7c5fc9b3dbc929086227f88b9d328127a31e1c7951b9140a27226ba813f316bfbaeda1b6fadb3b6315c07ccd8d7248cb4ecad921e2dbfc24502f1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}