{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "315735831",
    "entityType": "Track",
    "nonce": "0x4c6cd98c4193db9915cd23e0b6adced41a6b64aaaf793faab3ba9a80b82be735",
    "signature": "0x22de1a675dd35b275aa2f8b6eb4c2933bcc6328e5d44412d60ac304fdeeee80b298b4fccdfc8b759ea20143619a02d7e403fb9a8e9235bfc49222faf4ec8d12a1b",
    "signer": "0xc350d890DCc6382B84906765c352e34689f1F38f",
    "userId": "326760792"
  }
}