{
  "manageEntity": {
    "action": "Save",
    "entityId": "2075681998",
    "entityType": "Track",
    "nonce": "0xe0d7b007e0052aca29619f035c6fff5a35be3cbc2efb0e7bd63e27e11e56d3ae",
    "signature": "0xdcd37f5b7b5c521c0c1a3172da34c5c1540f26374c4569ed7839ed3a93d3cb4e0a59f49b3217a2ad73b4a535c432a2102f8ce148062eb810ef3f01a65201b7621b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}