{
  "manageEntity": {
    "action": "Save",
    "entityId": "2125410349",
    "entityType": "Track",
    "nonce": "0x0358ee6d2b191deca9572e4d649c43d886e2d404db90e5a4181ff3503206b487",
    "signature": "0x2aecadab576ddb246d9adbd5a7f4e1f79de6a6623aecc990d44b05c2b54eb5e87f98e9136c306f3f0bed8aededbce5e813158589074a1d05598e1587f73f32b21c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}