{
  "manageEntity": {
    "action": "Save",
    "entityId": "807762",
    "entityType": "Track",
    "nonce": "0x0edbc1bfa597cbd916f4264ea041c1631f63e7b0421e10ebc209ce98c98f4bbb",
    "signature": "0x69331d167cd494c2bfe476866f4680516eb217a1e016f68bacf5fd857f2c30b31cf0cda588ef11373c8bfd81bdec57895a4c6f92f5cba1d22a9ec6b172985b1b1c",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}