{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1415109223",
    "entityType": "Track",
    "nonce": "0xe7c1a30cbce76b8e00532b8abbfcb90909ac62966cf09d5a7f422e5fbd154428",
    "signature": "0xec233f88bb5a1f0981a3c7d04c25c82f07a0172e402b4dd2be51ed5092c5d77c2367cf71e6c8d62efc40990a57fe8df956ead2bbb3681f5273a03f2cb05c14131b",
    "signer": "0x3504A096a184AdFd1ed71f0281661a5d34a1f2A6",
    "userId": "720251199"
  }
}