{
  "manageEntity": {
    "action": "Save",
    "entityId": "1003260",
    "entityType": "Track",
    "nonce": "0x96ac612b82690eb5053de944f4d88b38e821a666106d10552cd1db25e8f7d1b4",
    "signature": "0xe6b7e01604d90c718cdad4c5c78006ca15d23f26fe84f9af04fce74a45a0b4c3558051b90bead15aa79ad41ae46d84c79f32752a2332b3f758612c4e534576451b",
    "signer": "0xF337278E02dE52353616Fbd76ba73029c175C492",
    "userId": "666725895"
  }
}