{
  "manageEntity": {
    "action": "Save",
    "entityId": "1598760384",
    "entityType": "Track",
    "nonce": "0x746ed56818a0ae3419ca0f09d0ef5317aef945880b085f6cf02ff6bd7378ad8b",
    "signature": "0x7dd594dda9da8a16a317ff6e8ad7797e9e0e0a9db59a87b9dc0bec64887a03577b092ea9780bdf990034b2ce02a6c5f2e009286acbd61ebf9032a2725b813f231b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}