{
  "manageEntity": {
    "action": "Save",
    "entityId": "2115726294",
    "entityType": "Track",
    "nonce": "0x05d0e26f4f51bac8218128ae37a833267afb905ffce84b6f12f0b19bf1700f5f",
    "signature": "0xaf913fed836c2e3c3f4aedefb97d7d1d06772e68d75b2fd05173f3d42fe47c3a2f358c8e34c39006b119c68885f1ae14e81d8abc2d96763029a8e43f303e59011b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}