{
  "manageEntity": {
    "action": "Save",
    "entityId": "761480712",
    "entityType": "Track",
    "nonce": "0xc9dc27bdb28ce730cc4e6c05f15830a6c6741d74c7ea7a6de480ffbbaf959185",
    "signature": "0xbf98583b658ca01db061e67c40869c5512545c1fb2a05503abb365901956ceed6e04ee16ed276df0455de556ff1c519774ae4e9effa382e642886c23d4a19c3b1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}