{
  "manageEntity": {
    "action": "Save",
    "entityId": "969166254",
    "entityType": "Track",
    "nonce": "0xfc37c24b0964376466519f13f1c8c064d06404cbeef2d2e8a6eb5b6b9370d134",
    "signature": "0xab40399cd04e75830bb0224825de0f6c5063503f73f45d7a5edb39124ea24d8874d6965f800b29ecf7cf29f6f2452713444f52cbad6a478d7d685696e0e4822a1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}