{
  "manageEntity": {
    "action": "Save",
    "entityId": "1500918577",
    "entityType": "Track",
    "nonce": "0xcc85c5911a7b0294df1c7a39b5702b6840e5ad34bdcb35d929ebff357c95edb7",
    "signature": "0xee441ae78873b0b1ea9ef92fb19bc2692d25f321edf72be7ba5baa480d9b7f695f5fe8070424658451c6fc025ac0d56d31aff384ed30f6a3a721383074042ad31b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}