{
  "manageEntity": {
    "action": "Save",
    "entityId": "1822764224",
    "entityType": "Track",
    "nonce": "0x4efcb788c328a2542de287ab8e694c18b9373bbc2322629819772f6196bccf68",
    "signature": "0xce34d660de6a0eb6c632132ec31ad8a27f2b12dff96eb548475f4a95b6e2984972678fb71091c45634e1624979ea7ad36ecc56415b0cf62dfa034555e1e097b01c",
    "signer": "0xa603e9487Ed7C3C62E8acb85f8f32acFf5d6349b",
    "userId": "278135553"
  }
}