{
  "manageEntity": {
    "action": "Save",
    "entityId": "209318",
    "entityType": "Track",
    "nonce": "0x19e7efa608f8fd79a685a2bb8cbc5ef94d020590e7f5cd829878a73556f87c6f",
    "signature": "0x6aa5cf98361a373d74646034d5e56a0e16af997e60dba3c86254cbf861bd14515e584ff985d138f1e1ec32d249f7a4ad48e5fa3ceebe453d337bf1011419fcca1b",
    "signer": "0x95bc9101F0E3125Dab3b9e39ACc2b72eE7C8a02c",
    "userId": "380062588"
  }
}