{
  "manageEntity": {
    "action": "Save",
    "entityId": "299841646",
    "entityType": "Track",
    "nonce": "0x1527f3240c25fc78b4bc1512f2c1a9defbdd19155a1ffd111821632affa27a91",
    "signature": "0xca904233a062c5a7b935fb6e3109cd32b4238e64482e5f45998f26fa4c89055c2b918512087b411593c0aeed3ffcbf878180ca719c88352c9948fc2c4f1f40f41b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}