{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121087947",
    "entityType": "Track",
    "nonce": "0x037f55e211f248bff22247aca71ce4a9572cc000bf2c715f97484a98eaeecee6",
    "signature": "0xa257eb7e86187a3153bb944916caa01a8b6e643265816f10844dcc3e21838acf1a3e855190f3713025d882ba5bb7671069f43dbd453fcc13c3eb4f348b50774e1b",
    "signer": "0xf954E35976C0aAaEC2968197F2a371Cc99E7C81A",
    "userId": "102143"
  }
}