{
  "manageEntity": {
    "action": "Save",
    "entityId": "931700",
    "entityType": "Track",
    "nonce": "0x8240b2a88c81e65489c6077a7a58aa39beb9ed3fe40feef5cfc3398d452c9181",
    "signature": "0xfde6328469bfc2abfa8b4112f1d514c59eec8e470a633c6ac10588ed8537ca1739b9145e5e51606525b7aee86f753a52f2cd2112f18c812722f62fe0088ae7471b",
    "signer": "0x95053e208ed4683dC71E3025336b339dc6C13f1B",
    "userId": "90610656"
  }
}