{
  "manageEntity": {
    "action": "Save",
    "entityId": "166117896",
    "entityType": "Track",
    "nonce": "0x0ff65cd437b33b49bb820a84cd2bc2122c75dceb47c8231d0448e3d17953c90c",
    "signature": "0xaead9f298fd8ba71ced057feae0c4c45d21cfc38efb2401b41e8a2bdb69ecc3958bee3a40389a208f6d82057389514db6a64ce00282cc5d8d535fb5d909a5cd71c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}