{
  "manageEntity": {
    "action": "Save",
    "entityId": "2011913885",
    "entityType": "Track",
    "nonce": "0x8b6faa71728823ffda29f2104d764b1d0a78f3430834ad2e52b5a31715afdcfd",
    "signature": "0xb698bac7513704c1c35a455e98d4f56c848789259926a0e3b4200714ec5d71d2356882886f96a88a5ec000e3e04fd7ff86b1a77655a2b50eb6b1c77da57f7bcb1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}