{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "691215222",
    "entityType": "Track",
    "nonce": "0x74e8d732df3bfc56cce56cb954df29f9d76aa2cbd49573a895388a0887a2968e",
    "signature": "0xcd761d97c8912f09a427804eaa8b8202e7fc39beb572383a785792f7c963cc2b66a388d6e881e29c8c7ebce9c729de926c6effbd8cbfe46cb902290bd73685d81b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}