{
  "manageEntity": {
    "action": "Save",
    "entityId": "7583014",
    "entityType": "Track",
    "nonce": "0x260173f2fd48d8c6d9d984460f310791853e3bded10f869352cf463e953c5949",
    "signature": "0xcbc6e46d64d9fc5f6ac23f81ceb816ed1b26776e90bf4d1dcaa9417586b4624d69cd09f0f8bf9f7a92bbf80ca5e84ea02d9f8579b77f3f75dd1a440d073737d81b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}