{
  "manageEntity": {
    "action": "Save",
    "entityId": "89247206",
    "entityType": "Track",
    "nonce": "0x1f53f2257af3cd1d716a6ad9d65fdbcdcd2a142796c0a4d59d53530f3da3b46f",
    "signature": "0x87c1fa9538fb0cbc6f76e189b006990c6c53b6dcfd957819d033bc9244655d3e28592a48148592fe61875c2576ba1f74cc5500676f7848d9efbd0f5a1a4d925b1b",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "105826"
  }
}