{
  "manageEntity": {
    "action": "Save",
    "entityId": "261224",
    "entityType": "Track",
    "nonce": "0x88cea5013458d2ef75b1e5b85378f92c971f33a40b4652d73b437185a5cf8409",
    "signature": "0xb2ba855b7b73a0820b38ebb6e45408b1cde2dec050b284e3954dad48a229037a1fe77b6c2ee220ac56e0e4cb90ea7bcf1fbff3d7acae0745f8c44abf9229a7c71c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}