{
  "manageEntity": {
    "action": "Save",
    "entityId": "1743892398",
    "entityType": "Track",
    "nonce": "0x50fb36b5b1a596ef2faf473a81264394f790b1e802d3c5f2e43b491d5ce8551c",
    "signature": "0x0974fa5a36dc9a7f84bf5aa0baade61bd283e0b85517477b182456e9ea8e1fec604506690bbaa5a486f70539d192ab636b584afd2be25c30d1bcd6b28c0331091c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}