{
  "manageEntity": {
    "action": "Save",
    "entityId": "1024874",
    "entityType": "Track",
    "nonce": "0xbcefd5e58ede9fc0e1074af169da22d30332d3b0519b4335151c79016e9dde92",
    "signature": "0xfc6979a637d51a089635f6554cd793eaa2f0d15a3c6e089530333855eea3d32d11c3c1fc86656a26e8049177d0d9035624f2aeac27c16ba4f61e4f41a3f559ab1b",
    "signer": "0x354f479338B7F1593E5Ed2Bdb91a09c4bD12996C",
    "userId": "381478870"
  }
}