{
  "manageEntity": {
    "action": "Save",
    "entityId": "187921270",
    "entityType": "Track",
    "nonce": "0x82ee20b9fe3aa22410af735f5e6e87737307a50c186d9829cac5ed105db8614e",
    "signature": "0xc8a6cc0b80f0befdac0a813d218cebe9b0cf11f440e477fe6321b9edb209e8f346e5cdd51c966a65eb2108f5f77613397e806a4986ac166f8d0c99f9f685000e1c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}