{
  "manageEntity": {
    "action": "Save",
    "entityId": "2001684044",
    "entityType": "Track",
    "nonce": "0x3afe641bb89fa4072d7cd1c5b79fe2316a3838f7b782ce3c6663edfc1a5b8234",
    "signature": "0x2c6d39d7639d9a2e6614cf70e4d9f43b86117deeba5897886935e1dcaa43854d425237d73ae2db3bec9717b95291a42e75f2a2266c427dfece64bdf5402b6bc81b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}