{
  "manageEntity": {
    "action": "Save",
    "entityId": "1680144869",
    "entityType": "Track",
    "nonce": "0x1c28f64f6600cb6da3655544919134da367f214d6ef92496dc48316adfb4aba3",
    "signature": "0x1c80ad790265e3870ea2096dbac8e31b017c4b088c1185481529d6c577b116113b942b07e27765ecd542cdc95cd551e6b303a27bfe8289821217dc62cb2078dd1b",
    "signer": "0x8881F6444f88F6FEBd6dd703AcC9AcdFDFaFFBB9",
    "userId": "589290654"
  }
}