{
  "manageEntity": {
    "action": "Save",
    "entityId": "1052291341",
    "entityType": "Track",
    "nonce": "0x8957cd1d2c59396e939729e5d16dd40c10756f35a1ae1fccaf85693f62237392",
    "signature": "0x3585a3af48d249bf0df20cf4f0c81aa34f58c5a112c6769ff397edca56430458290e0b476e65642bfcdd6ecda2ba4218e57348716be9bc9dd48d8ead6d9712ab1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}