{
  "manageEntity": {
    "action": "Save",
    "entityId": "1277712980",
    "entityType": "Track",
    "nonce": "0x5650b984dc7cf222ed5c091e925ca9be83de890056f4a0312251c7a00b8ead86",
    "signature": "0x1a7cde74ad6f9f9fcb74ed777c1520228ad0ccad3b6f6b32682f7f972d12de6541d309835dfa3622b6dab54f628c468a7eab70a34c0355e564523454c13700791b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}