{
  "manageEntity": {
    "action": "Save",
    "entityId": "180339683",
    "entityType": "Track",
    "nonce": "0xc53ecfb2f38a61961efa62ef930aef2455773bb7f8a180dffaec158a4c2f9e6c",
    "signature": "0xe3454d22c8d76a5e2d888e17cd8474bac6901b19c52dad7c3f1adad1ec3e83b02d56f4316e12decddd1097dfe86ae89c2552f263dc822de3d09ee06952170a741c",
    "signer": "0xb205e691f66c34ECeeDe1b57Af02073564c2F8a7",
    "userId": "24712149"
  }
}