{
  "manageEntity": {
    "action": "Save",
    "entityId": "1270200132",
    "entityType": "Track",
    "nonce": "0x4a19667b90589fe912bce5ea6621e63b4f2b0eb9531420c83d793c7de6c79aa9",
    "signature": "0xe69c1f8401e37211c58ceaf51eec90f562ea4100c4aeddd7ddf48cea693ec67b76560d71b4e2c2a2519f6d7f86be4108163d4425d792a2e1006b069f34f60e561c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}