{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1856785749",
    "entityType": "Track",
    "nonce": "0x63e0b4f05d388e4705db2e0e1c40de4d0590ab73d6180001a95de016beca9025",
    "signature": "0x49cc3e9566b52e742295e6fff0bbb799368060627076a4be58af2fedb4fdddb9220f895a122bdc31cb4225ca3b240825fbfc29d1b477efcd213799b30f5130e51c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}