{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "513511541",
    "entityType": "Track",
    "nonce": "0xcd39dfc9bf4730cd13e23e4cb614007b884515f3bdf0f72b737526c2a5f26174",
    "signature": "0x207c1f988168437f7031c8b9c0ec069e59213bb84a47c4d9064afa011fc9e4c729b30cfcfb5093584b4c68f346214c6c34533d69b6136d1d5cbe27a7fee2dd921c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}