{
  "manageEntity": {
    "action": "Save",
    "entityId": "1391390455",
    "entityType": "Track",
    "nonce": "0xb1d530576c9dff75c54596dd8607e85dae1d7f0dbe811b1bc561330f00adfa86",
    "signature": "0x36f0b21d7fe7266180344b4a08354f288d325b58f57384ad2e4f12bd007e6e6c073241107c654727411ce552e0ab86698d024f4fb74926f40b6fbd0924e599641b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}