{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1404722761",
    "entityType": "Track",
    "nonce": "0x9d26cd9a73aa5ae2eefcad66ea68eaa1a17b6e46dca577eed4922996e4e67565",
    "signature": "0xbbeccc56274c2b032fa58eab2cd1de1310a150e95fe56b5c35105e083eb82abe421bd7552e447972cc1b23770d67b935db8aead4369c787700d8a42908b9c2ec1b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}