{
  "manageEntity": {
    "action": "Save",
    "entityId": "2027909137",
    "entityType": "Track",
    "nonce": "0xc1f8c7fa8bf1e3dbf4ebcd857ce2c00c8fea70de527f8da1372b250d3bdaef6a",
    "signature": "0x4a390c4039ee086aca34d03f50a8f614b8c6197fc14452a92ff859f6e624f6f63f9a2549ce48d8686e977e7f46bec5ebf2e24193a5524e75f6253ca09b1486d01b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}